http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48932
--- Comment #3 from John David Anglin <danglin at gcc dot gnu.org> 2011-05-08 23:02:21 UTC --- Actually, the args should be: -fpreprocessed sched-deps.i -quiet -dumpbase sched-deps.c -auxbase-strip sched-deps.s -g -O1 -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Wold-style-definition -Wc++-compat -version -fno-common -o sched-deps.s Appears to be fixed in 4.5 and 4.6.